Studies on bio-efficacy and phytotoxicity of mandipropamid 23.4% w/w SC (Revus 25 SC) on watermelon against downy mildew disease

Abstract

Watermelon (Citrullus lanatus) belonging to the family Cucurbitaceae is one of the most widely cultivated crops in the world. Foliar diseases of watermelon have become a major constraint in watermelon growing areas causing qualitative as well as quantitative losses. Therefore, a field experiment was carried out on the effect of Mandipropamid 23.4% w/w SC (Revus 25 SC) against downy mildew of watermelon during 2017-18 and 2018-19, at College of Horticulture, Hiriyur. Experimental results revealed that all the treatments significantly reduced the downy mildew disease severity over untreated control. Amongst all the treatments in both seasons significantly least disease severity of downy mildew (4.66 and 8.66 %, respectively) was recorded with foliar sprays of Mandipropamid 23.4% w/w SC (Revus 25 SC) at 1 ml/lit and highest yield of 24.62 and 18.36 t/ha, respectively followed by Mandipropamid 23.4% w/w SC (Revus 25 SC) at 0.8 ml/lit.